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Vulnerabilities

Vulnerability · OSV-2025-1020

Heap-buffer-overflow in mmcall

Published Dec 25, 2025 · catalog updated Oct 21, 2026 · Heap-buffer-overflow in mmcall

Last checked Oct 22, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for OSV-2025-1020. A missing EPSS score is not a low risk. Compare Heap-buffer-overflow in mmcall with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Heap-buffer-overflow in mmcall).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
OSS-Fuzz tarantool

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=471093652

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • OSS-Fuzz tarantool8c7cfb1cd0b3 → 63d9f01e339f (github.com/tarantool/tarantool)

How to fix OSV-2025-1020

  • Upgrade

    OSV-2025-1020 lists a fix boundary at 63d9f01e339f. Compare the installed build with that boundary before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for OSV-2025-1020. A missing EPSS score is not a low risk. Compare Heap-buffer-overflow in mmcall with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 8c7cfb1cd0b3 → 63d9f01e339f (github.com/tarantool/tarantool). Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 25, 2025 · OpenSSF OSV / OSV Scanner

    Detected

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=471093652

  2. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    tarantool fixed in 63d9f01e339f

  3. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    tarantool fixed in 63d9f01e339f (github.com/tarantool/tarantool)

  4. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=471093652

Sources

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • OpenSSF OSV / OSV ScannerOct 22, 2026